Make sure to use your king! When all else is equal, the side with the more active king will get the upper hand. If you're unsure how to evaluate a knight endgame, try to see which king is closer to the center or queenside -- the closer king will be able to contribute to the action first.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Strautin"]
[Black "Muller"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "8/3b1pk1/p5pp/1pR1P1qn/3N4/1P6/P4QP1/6K1 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. e6 { A discovery on the black queen. } 1... Qxc5 2. Nf5+ { A discovery on the
black queen again. } 2... Qxf5 3. Qxf5 gxf5 4. exd7 a5 5. d8=Q { White wins with a
large material advantage. } 1-0